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Bibliographic Details
Main Author:	Abraham Gómez Morales
Format:	Artículo científico
Language:	es
Published:	Universidad Nacional de Colombia 2009
Subjects:	Computación Redes neuronales artificiales Nuevas estrategias de optimización Algoritmos de inteligencia artificial Aplicaciones de inteligencia artificial Aprendizaje de máquinas y aprendizaje computacional
Online Access:	https://www.redalyc.org/articulo.oa?id=133113598004
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Utilización de las máquinas con vectores de soporte para regresión: m2 de construcción en Bogotá Abraham Gómez Morales Germán Hernández Computación Redes neuronales artificiales Nuevas estrategias de optimización Algoritmos de inteligencia artificial Aplicaciones de inteligencia artificial Aprendizaje de máquinas y aprendizaje computacional En este artículo se ofrece una idea global acerca del tema de máquinas con vectores de soporte y sus aplicaciones tanto para tareas de clasificación como para tareas de regresión, enfocándose en estas últimas con el objetivo de determinar cómo utilizarlas para el cálculo del metro cuadrado de construcción en Bogotá D.C. 2009 artículo científico 1657-7663 https://www.redalyc.org/articulo.oa?id=133113598004 es http://www.redalyc.org/revista.oa?id=1331 Revista Avances en Sistemas e Informática application/pdf Universidad Nacional de Colombia Revista Avances en Sistemas e Informática (Colombia) Num.2 Vol.6

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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